(which I can't understand other than it being a cost-cutting issue with us being the low man on the totem pole*, so to speak)
Puddi put it best (I'm paraphrasing here):
"If a freely-hosted forum set up in half a day could accomodate all of the Off-Topic posters and more, then The Lobby clearly wasn't wasting a lot of BioWare's money."
They want to kill forum traffic so as to drive away everyone who relies on this place as a community. BioWare wants to expend as little energy as possible managing this place because they don't see the benefit. BSN isn't a community to them, BSN is the enemy. Toxic forums, mod bots, they actively see BSN as a battleground simply because BioWare is unable to discern earnest criticism from unreasonable criticism. They can't handle it and they see it all as the same thing unless it's coated in effusive praise and bootlicking. So they're happy to cut away until all that's left are sycophants and low investment posters. Lore Discussion will probably be merged into the Story Section and Fan Creations will be merged into the General Discussions. Bump this post in 2 years when one of both of these sections will be gone.
It's akin to a gardener who is too lazy to water his plants. A gardener who then gets frustrated at them when they begin to rot or shrivel. Instead of saving a stem to replant or cutting off the rot, he pulls the whole plant out of the ground and throws it away. Before going back to reddit instead of watering his other remaining plants.
Not that I'm putting anything on Bryan for the OT deletion or anything, he's not part of the Community Team and he seems like a decent guy. But his attitude is part of the problem and clearly one that is shared across the company judging from their actions.